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How to use support FileProvider for sharing content to other apps?
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Using FileProvider from support library you have to manually grant and revoke permissions(at runtime) for other apps to read specific Uri. Use Context.grantUriPermission and Context.revokeUriPermission methods.
For example:
//grant permision for app with package "packegeName", ...
Do spurious wakeups in Java actually happen?
...hread_cond_wait() function in Linux is implemented using the futex system call. Each blocking system call on Linux returns abruptly with EINTR when the process receives a signal. ... pthread_cond_wait() can't restart the waiting because it may miss a real wakeup in the little time it was outside the...
When to use the brace-enclosed initializer?
...py (=) initialization (because then in case of error, you'll never accidentally invoke an explicit constructor, which generally interprets the provided value differently). In places where copy initialization is not available, see if brace initialization has the correct semantics, and if so, use that...
Elegant solution to duplicate, const and non-const, getters? [duplicate]
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I recall from one of the Effective C++ books that the way to do it is to implement the non-const version by casting away the const from the other function.
It's not particularly pretty, but it is safe. Since the member function c...
iOS 8 removed “minimal-ui” viewport property, are there other “soft fullscreen” solutions?
...ents of the main element). Disabling document scrolling
prevents accidentally leaving the minimal-ui when scrolling upwards.
As per the original iOS 7.1 spec, tapping the top bar brings back the
rest of the chrome.
The end result looks like this:
For the sake of documentation, and in case...
multi-layer perceptron (MLP) architecture: criteria for choosing number of hidden layers and size of
...echnique, then always start with one hidden layer. Almost certainly that's all you will need. If your data is separable using a MLP, then that MLP probably only needs a single hidden layer. There is theoretical justification for this, but my reason is purely empirical: Many difficult classification...
Creating an R dataframe row-by-row
...ke to construct a dataframe row-by-row in R. I've done some searching, and all I came up with is the suggestion to create an empty list, keep a list index scalar, then each time add to the list a single-row dataframe and advance the list index by one. Finally, do.call(rbind,) on the list.
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What does the 'static' keyword do in a class?
...llion instances of the class or you don't create any. It will be shared by all instances.
Since static methods also do not belong to a specific instance, they can't refer to instance members. In the example given, main does not know which instance of the Hello class (and therefore which instance of...
How can I specify a branch/tag when adding a Git submodule?
...hich commit their submodule directory points to. git submodule update actually merges in the new code.
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How to get current foreground activity context in android?
...n of document-centric recents means it can leak person information to the caller. For backwards compatibility, it will still return a small subset of its data: at least the caller's own tasks, and possibly some other tasks such as home that are known to not be sensitive.
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